sturtevant



lilnited @Sendra iilzttrnt diamine'.

f Letters Patent No. 95,849, dated October v12, 1869.l

APPARATUS POR UTILIZ'ING- HEAT.

n. Schedule referred to in these Letters Patent and making part of the saure.

Io whom it may concern Be vitelmowntlmt I, B. F. Srnnrnvssr, of Jamaica IIains, in the count-y of Norfolk, and State of lirassachusetts,u have invented an Improved Apparatus for Reclaiming Heat from .Hot Volatile Products of Combustion; and I do hereby declare that the fol-vn Ilowing, taken in connection withthe drawings which accompany and form part of this specification, is a description of my invent-ion, sufcient to ena-ble those 'skilled in the' art to piactise it.

In situations where power is used, there is generally escaping into chimneys, from steam-boilers, forges, furnaces, Ste., lunch more heat than is necessary for the purpose of creating a draught, all such excess be- 'ing actual waste of heat and fuel.

In such cases it isalways possible to make use of a rotary blower; and f My invention consists in intercepting Aescaping hot Volatile products of combustion, by means ot' an encased series of tube's, so .located and arranged, and

kcombined witlrinlet and delivery 'air-pipes, connected 'tof the tubecase,-an'd Awith a rot-ary blower, and one or more distributing-pipes leading therefrom, that '.the escapingcurreut shall pass through. the. series of tubes, and shall heat a current of air, which, by the action of the rotary blower, combined with the case surrounding the tubes, shall draw air into the tube- :case so as to surround the tubes and abstractheatfrom the hotcurrents passing through the tubes, and /shall 'draw the air so heated into the blower, and rshall force it out, through the blower-outlet, through fany or all of the distributing-pipes leading from the blower-outlet, said pipe or pipes reaching to one or several apartment-s, more or less distant iiom the blower', which, orrany of said apartments, maybe heated at will, accordingly as the forced current from theblower is made to traverse through one or more -.of-thc distributing-pipes.

;\ NI iy this combination I am enabled to economize 'heat escaping to waste, and to direct and force it, mingled with pure fresh air, to apartments which are sollocated, with respect to the place .from which the heat is received, that natural draught would be inet'- fectual to create the necessary current, and thus I am enabled, with some expenditure of power, to heat .and ventilato distant spaces, without regard to their f n location.

'.lhe drawings show my improved combinatiom.

'adapted for utilizing the heat escaping from a vertical tubular steaingenerator, though the enclosed series of tubes may be interposed between anyconibastion-chamber and the chimney thereof.

-Figure 1 is a sectional elevation of the combina tion, the section being taken in the plane of the line z z, Figure 2, which is an end viewoi' thc combination. atrepresents a metal piece, which serves as the smoke-box'or bonnet, which rests on the upper end of a vertical tubular steam-generator, or which is ccnl nected to. any passage-way conveying volatile products of coinbnstiomthe piecea conuing and directing the ,escaping volatile products of combustion. Y

'The' smoke-box supports an enclosed series of4 verltical tubes, the tubes being denoted by b, andtheir surromn'ling case by c, the heads lor tube-sheets of' which are marked d d. A

The top head d'supports a bonnet, Ae, which, at its upper end, contracts to suit the diameter oi' the pipe or f iue f, through which the smoke and gases dc- 'pri-ved of their excess of heat are lcd ofi' to achilnuev.

At one side of. thecase c a pipe, g, enters the space containing tubes In', and -at the other side of the case is the pipe h, leading to the rotary'blowert.

'.lhesepipes g and 7i, may be otany length required in various locations, and through them, under the in Yiuence of the action of'the blower, air enters case c around tubes b, and is drawn out therefrom in a heated condition, in the directions indicated by. the arrows markcd on thc drawings.

The pipe It discharges into the cent-re of the blower, and, by the act-ion of the fan-wheel therein,-is forced from the blower, through its outlet-pipej, into a chamber oran enlargement, 1.?, from which proceed one vor several distributing-pipes l, which may beprovidcd with dampers or valves, arranged so as to :cnn-

trol passage through any one o r all of said pipes l.

'lhe direction of the hot volatile products oi' com-- bustion, inpassing through the apparatus, is indicated.

by the dotted arrows seen on the drawings.

The tubes b should -have an aggtegatc area equal to or in excess oi the area of either passage, by which 'the smoke, Sto., enter to or escapes from said tubes.

The tubesare arranged vertically, so that they may be easily swept or cleaned, said arrangement being preferable to a horizontal arrangement of thegtubes, in which all solid matt-er, such as ashes, would deposit, and would soon choke up the tubes. v l

The pipe q may be made of any length, sov as to have its end remote from the case c, where it can receive pure iiesh air, or the pipe g can be arranged as a return-pipe from the room into which the outlet from the blower delivers. v i

. The blower may be arranged to force instead of" to draw air through tbe case containing the tubes which carry oi` the volatile products of combustion, in which case the distributing-pipes Z would be attached directly to the outlet-pipe h fromthe tube case.

I claim, for utilizing the heat escaping in currents of volatile productsgofcombustion, an encasedl series of tubes, provided withfinlet and outlet-pipes for said v. volatile products,and*with an-air-i'nlet and an air-outil let entering and proceeding from the enclosed space around the tubes, when" combined with av rotary blower, by which air is passed rapidly through said airpassages, and is forced from the outlet of the blower in a heated condition, substantially as described. Witnesses: IB. F. STURTEVANT.

J. B. Gnosr, FnANcrs Gouw. 

